Holley HP or Dominator EFI. Either ECU can do an LSx and the Dominator does LSx and 4L60/80e trans aswell. Touch screen is nice replacement for the laptop Due out in a month or two.
http://www.holley.com/Index.asp?division=Holleyefi
I've run/tuned everything from basic SDS systems years ago to Motec. They all have merits.